Machine for building rubber conduits



Oct. 13, 1931. J. I. HAASE MACHINE FOR BUILDING RUBBER CONDUITS 2 Sheets-Sheet l Filed July 27, 1929 Jorge LHaase Gum/m Patented Oct. 13, 1931 UNITED STATES PATIENT: OFFICE JORGEN I. HAASE, OF AKRON, OHIO, ASSCGNOR TO THE GOODYEAR TIRE & RUBBER COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO MACHINE FOR BUILDING RUBBER CONDUITS Application filed July 27, 1929.

This invention relates to the manufacture of conduits composed of rubber and'fabric and it has particular relation to a machine for assembling the rubber and fabric upon an elongate mandrel, preparatory to vulcanization of the'assembly.

One object of the invention is to provide a machine for manufacturing conduits in which rubber and fabric comprising the latter are spirally folded about a mandrel as they are conducted thereto.

Anotherobject of the invention is to provide devices for folding rubber and fabric about a mandrel which are so adjustable that they may be employed in conjunction with different sizes of mandrels.

As heretofore pract1ced,-var1ous methods have been employed for manufacturing rubber conduits. For example, a common method comprised so rolling a mandrel laterally over an elongate strip of rubberized fabric that the fabric was wound thereabout into cylindrical form. This method was'very successful, although its practice required'consid- F1 erable labor especially Where the mandrel was of considerable length. Moreover, the pres sure applied to the fabric frequently var1ed throughout thelength of the latter as it was applied to the mandrel.

Another method comprised conducting fabric longitudinally of a mandrel through a funnel-shape device which automatically folded the fabric about the mandrel. Where this method was employed, it also was diffi- 1-! cult to apply pressure uniformly upon the fabric because the funnel did not exert a uniform pressure against the mandrel but mere ly directed the fabric to approximately the form thereof.

According to this invention, a pair of oppositely spiraled brushes are disposed upon opposite sides of a mandrel and, owing to the resiliency of the bristles, they exert a "resilient but uniform pressure against the mandrel. By reason of the spiral formation of the brushes, the fabric, as it'is conducted between them and the mandrel, is folded about the latter and firmly pressed against it. Another feature of the invention resides in such an adjustability of the brushes Serial No. 381,664.

that different sizes of mandrels may be emv is composed of horizontal frame members 11 and 12 and vertical frame members 13.

The upper sides of the frame members 11 and 12 are interconnected by spaced plates 16, 17',

18 and 19 which are bolted thereto, as indi- 'cated at 22. The plate 16 is disposed at the end of the framework adjacent the vertical frame member 13 and supports a bearing bracket that is bolted to the plate, as indicated at 26, and in which a grooved roller 28 is journaled. The plate 19 is disposed at the opposite end of the framework and supports a bearing bracket 31 that is bolted thereto, as indicated at 32. This bracket has a vertically projecting plate portion 33 which rotatably supports a shaft 37 having a grooved roller 34 secured thereto that is aligned with the roller 28.

An arm 35, pivoted at one end, as indicated at 36, to the vertically projecting portion 33 of the bracket 31 and above the roller 34 has a grooved roller 40 journalled at its "opposite end upon a pin 41 secured thereto. The rollers 34 and 40 are disposed in the same vertical plane and the latter roller is resiliently urged toward the roller 34 by a spring 42 connected at one end to the arm 35 as indicated at 43, and at its other end to a bracket 45 rigidly secured to the vertically projecting portion 33 of the bracket, as indicated at 46. The rollers 28 and 34 are adapted to support a cylindrical mandrel 47" while the roller 40, being resiliently pressed downwardly, engages the upper surface of the mandrel and holds it firmly in engagement with the roller 34. The plate 17 supports a bearing bracket 50 bolted thereto as indicated at '1. This bracket has a vertically projecting plate portion 52 which,-at its upper end, has a laterally offset portion 53. A shaft 54, journaled in the upper portion of the plate 52, is adapted.v to support a roll of fabric 55-." Fabric 56" from the roll 55 is conductedovera pair of rollers 57 and 58, that are secured to V shafts 49 and 59 journaled in the plate 52' and thence to the mandrel 47.

A motor 60, mounted on the floor beneath" the framework 10, is provided with a shaft .61 having a sprocket wheel62 thereon. A

- chain63, trained over the sprocket wheel 62 also is trained over a sprocketwheel 64 which is rigidly secured to a shaft 7 0 journaled in I bearing brackets 71 and 72 depending in spaced relation from, the horizontal frame member 11. On the end of the shaft opposite the sprocket wheel 64, a bevel gear 7 6 is rigidly secured, which meshes with a bevel gear 73 rigidly securedto the lowerend of a vertically disposed shaft 74 also journaled in the bracket 72. The upper end of the shaft 74 is provided with a bevelpgear 75- which meshes with a bevel gear 77 rigidly secured tome shaft L Hence, the roller 34 ispositively driven and by its engagement with the mandrel 47 moves thelatter longitudinally of the framework 10f The shaft 70 adjacent the sprocket V Y I v wheel 6 4'is" provided with'a bevelgear .80 which meshes with a bevel gear81 secured to the lowerend of; a vertical shaft 82 that is journaled .at its lowenend in-the bracket'71 andv at itsupperi end in a bearing bracket 85 secured to the plate 52 as indicated at 86.

- QThe upperend of the shaft 82 is provided 'with a bevelfgear 87 which meshes with a bevel gear 88 secured tothe shaft 49 of the roller 57 It follows that the roller." 57, "being driven positively,;unwinds.the fabric 56 from the roll 55. The shaft 49 of the roller 57 also is provided with a sprocket wheel 89 aboutwhi'ch a chain 90 is trained. The latter in turnis trained about a sprocket wheel 91 secured to a shaft 92 journaled in the laterally offset portion 53 of theplate52. The

latter shaft is provided with a" roller 93 which] has peripheral engagement with a roller 94 "journaled in the "free end of'an arm' 95, as indicatedat'96. This arm is pivoted, as -in-.

dicated at 97, to the plate 52 dja ti shaft 54. The TIOllET'94 is adapted to unwind a liner disposed-between the. convolutions of fabric 56 on the roll 55, simultaneously with V the unwinding of the fabric 56 The plate .18, securedto' the upper sidesof the horizontal frame membersll and 12,, supportsalpair offabric foldingidevices, indicated.. enerally at.='=and' 101. .f' As best shown y Fig.1, the fabric folding device 100 comprises a base 102 havingvertically projecting sides 103 and104which respectively have in their adjacent sides, guide grooves 105 and 106. A slide is disposed between the vertical projections 103 and 104 and, as shown by Fig. 3, is provided at one end with a vertically projecting bearing journaled in the bracket 112 and alsoslidably journaled in a bearing 115 integral with the frame plate 18. One end of the screw is provided with an'oper'ating hand wheel 114,

grooves 105 moved relative to the. slide110.

The slide is provided 'withan upwardly extending bifurcated portion and an offset bearing portion 126 (Fig. 1)} Between the bifurcated ends of'the bifurcated portion 125, a verticallyiprojecting bar 128 has its lower end pivoted upon a pin129thatis mounted in such ends. This "'ba r 128 is adjustably connected to} the offset bearing portion 126 abifurcated bracket having itsbifurcated ends pivotally'connected to the bar, as indicated'at 136, andhavinga screw threaded connectionwith ascrew'137 rotatably. but non-slidably journaled in; the offset bearing, portion 126. disc 138, secured to the screw, facilitates rotationpfthe latter and adjustment of the bar 128 relative to the the bar 128 has asemi-cylindrical' recess opening upwardly which receives-a trunnion 141:. The trunnion is rigidly secured to a spirally formed bar'160 which, on its inner surface, is provided with bristles 161. This bar'is disposed spirally about'one half the circumference of the mandrel 47. V

A collar on the end of the trunnion remote with respect tothe bar 160, normally is disposed in an enlarge d'end portion of the with respect to I therecess, A. block'1 66 on the trunnionat the opposite-end of the recess 140 prevents longitudinal movement oftl e trunnion intheopposie direction with respect to'the're'cess. The trunnion 141'further is retained in there'cess 140 by a plate .142 pivoted,as indicated at 143, to the bar 1.28 andnorm ny disposedover theshaft 141; Asbest bracket 112. A screw 113 .is non-slidably oifsetbearing portion 126, The upper end of V recess 140, thereby preventing lon'gitu 'dinal movement of the trunnionln one direction shown by Fig. 2,.the pla-te142, at its end "oppositeits pivot 143, isprovided .with a. slot 148'adaptedto receive a b0ltl149 pivoted at l its lower end to the bar '128'onthe side thereof opposite the pivot'1 43; i .wing nut 151, threaded onitheouter end of. theboltand abutting the plate l42,'retains'the platefir'inly against thetrunnion141. i V

The folding device 101is 'similanto'the sill.

'172 in the adjacent sides of which grooves173 and 174 respectively are provided. As best shown by Figs. 1 and 2,21 slide 17 5 is disposed between the vertically'projecting portions171 and 172 of the base 170. This slide is provided with a vertically projecting bearing bracket 176 in which a screw 177 is rotatably but non-slidably journaled. At its outer end, the screw is provided with an operating wheel 180, while at its inner end, it is threaded into a second slide 182 which has edge portions disposed within the groves 173 and 174 inthevertically projecting portions 171 and 172 of the base 179. The slide 182 is identical Opposite ends of'the bar 191 are pivotally secured to ends of the slides 110 and 175 by means of pairs of links 193 and 194. Inorder to limit movement ofthe bar 191 about its pivot 192, screw devices 195 and 196 are mounted on the plate 18 on opposite sides of the pivot 192 and are adapted selectively to 7 engage opposite ends of the bar 191. Each of these screw devices comprises a bearing 197 mounted upon the plate 18 and has a screw 198 projecting therethrough that is adapted toengage the bar 191. These screws are adjustably locked in position by lock nuts 199 threaded thereon and abutting opposite sides of the bearing 197.

In order to lock the slides 110 and 175 in their operative positions, a locking mechanism (Figs. 1 and 3) is provided, which comprises bars 210 and 211, slidably projecting respectively through vertically disposed openings 212 and 213 in the plate 18 and like openings in the bases 102 and 170 respectively.

p Also, these bars are adapted to project into r are pivotally secured at their lower ends to a V .treadle 226. The rods 225 and 237 are resiliently retained in their lower positions by a spring 227 connected at its lower end to a bracket 228 to which the foot treadle 226 is openings 215 and 216 in the slides 110 and 175 respectively. The bars 210 and 211- at one end are pivotally connected respectively to arms 220 and 221 by means of pins 222 and 223.

These arms are pivotally connected intermetowards or from the slide 17 5.

brush 160 mounted on the slide 120 can be moved with respect to the slide 110 by rota- 110 and has a threaded end pivoted and at'it's upper end to the rod 225,

as indicated at 230.

In operation of the machine, as aforedescribed, rotation of the motor causes rotation of the roller 34 and hence, movement of the mandrel longitudinally thereof. Operation of the motor also causes feeding of the fabric 56 to the mandrel and winding of the liner 95 upon the liner roll 94. With the spirally formed brushes in their operative position, it is evident that the fabric is folded about the mandrel and resiliently pressed thereagainst at all points. After the mandrel is covered with fabric, operation of the foot pedal 226 releases the slides 110 and 175 and permits movement of the brushes in reverse directions to inoperative positionson opposite sides of the mandrel. This permits a second mandrel to be positioned between the brushes without interference by the latter.

The brush 190 can be moved with respect to the mandrel 47 by rotation of the hand wheel 180. It will be observed from the pre vious description that the screw 177 secured to the hand wheel 180 is non-slidably journaled in a bearing bracket 17 6 which forms part of the slide 17 5. The screw also is threaded into a second slide 182 which supports the brush 190. It is evident that when the hand wheel180 is rotated that the slides 175 and 182 are moved with respect to each other and hence that the brush 190 is moved Similarly the tion of the hand wheel 114, because the screw 112 rigid with the hand wheel-is non-slidably journal'ed in a bracket 112 secured to the slide projecting into the slide 120.

Inasmuch as the slides 110 and 17 5 are interconnected by a bar 191 pivoted, as indicated at 192, to a stationary part of the framework, any movement of either of the slides 110 and 175 results in a corresponding movement of the other slides but in an opposite di rection. Hence, if the hand wheel 114 for example is moved toward the mandrel, the brush 160 is moved away from the opposite side of the mandrel, while the brush 190 is moved in a direction opposite that in which the brush 160 is moved, and also away from the mandrel. F rom'the foregoing description, it is apparent theta machine has been provided for folding rubber and fabric about a mandrel in such manner that the fabric is firmly pressed against the latter at all points. Owing to the resiliency of the bristles on the spirally formed brushes, this pressure of the fabric against the mandrel is resilient and hence.

prevents any damage to the rubber and tab differentsizes may beaccommodated and that "sume and have described those forms in del the invention or from w il tail, it will be apparent to those skilled in the 'art that the invention is not so limited but that various modifications may be'made therein Without departing from the spirit of the scope of the -ap pended claims. I 7 V I WVhat 1 claim is:

1. A machinelfor manufacturing'conduits 7 upon a mandrel comprislng vmeans for moving thermandrel longitudinally, means for feeding fabric to the mandrehand a member spiralled about the :mandrelfor folding the "fabric about the latter, said'member having bristles n itssideadjacent the :mandrel.

V 2. .A" machine for manufacturing conduits upona mandrel comprising means for mov- 1 ing the; mandrel longitudinally, mean'slfor feeding fabric 'tofithe mandrel, "a fabric'flfold 5 ing' member sp-iralled about a portion of the mandreha second fabric-folding member spirailed; about 'another portion -:of the mandrel, and ,means for simultaneously moving the members toward or away from the mandrel.

A machine for manufacturing conduits simultaneously. i 1

In witness'whereof, I liave hereunto signed ii-s am 6. A machine, for manufacturing conduits upon a mandrel comprising. means for moving the mandrel, means for feedingv sheet material'to the mandrel, and :a pair of: fabric folding brushes spiralled about the mandrel in opposite directions.

7. In st-conduit folded, a member having bristles onits side adjacent the mandrel, the bristles being 2 adapted to contact with the fabric or the like as fold it around the mandrel, and means for moving the mandrel relative tothe member.

8.; In a conduit building machine, a mandrel about which fabric .or the like is to be building machine, a mandrelabout which fabric or. the like is to be folded, andapair of brushes sp-iralled about V the mandrel in opposite directions 9. A machine for manufacturing conduits upon a mandrel comprlslngtalpalr of memjbersspiralled about the mandrel in opposite directions for folding fabricor'the like about the .later, ,means for adjusting each of [the members with respect to the other and to the mandrel, and'means for moving thezmembers o Signed at Akron, in thecounty ofiSummit and Stateof Ohio 118. Arithis 26th day of July, 1929. v

:upon a mandrel "comprising means for mov- 1 ing the mandrel longitudinally, means for feeding tfabric to the mandrel, :afabric foldling memberl-spi'ralled'about a portion'of the mandrel, asecond [fabric ifoldingimember'spiralled aboutanother portion of the mandrel,

1y toward or away from the mandrel, and means for separately adjusting each, memb'errelative to the :mandrel.

4. machine for manufacturing conduits means for movingthe members simultaneousuponaamandrelcomprising-means .forzmoving the mandrel longitudinally, I'IIlBHl-S for feeding fabric tothe mandreh apa-ir of fabric 7 folding members disposed on opposite sides of the mandrel, each memberfbeing idisposed Jordan 1.1mm

adj'ustablyion a support, abar pivoted inter- Y ports, and means {for :moving the bar about its pivot.

mediate. its ends to a :stationary' pivot and having its *ends movablyv secured to the supv ports, meansfor movingthebar: rabout zits'f gpivot,-and mearis foralockingithe -bartin one l J -rmediate itstends to a'i'stationary pivot and ,having'its ends movably-secured to the sup '5 5. A machinewfo'r. manu-f acturingxconduits 1 -upon a mandrel comprising means for anoving the. mandrel longitudinally, means for feeding.fabricto-themandrel, a'pair-iof fabric vfolding {members disposed on opposite :sides of the mandrel, each member being disposed Jadjusta'bly on-a support, {a bar jpivotedL -interi r A 

